SPM leonova emerald - Measuring Points for Vibration

C:12 Measurement techniques always included
BC
Measuring points for vibration
Vibration severity is primarily a measure for general machine condi-
tion. Vibration at the measuring point should be representative for
the overall vibration of the machine. Typical measuring points are
the bearing housings. By measuring in three directions, one can get
an indication of the causes for increased vibration.
• Horizontalvibration(H)intheplaneofrotationismostrepresenta-
tive of balance condition.
• Verticalvibration(V)intheplaneofrotationismostrepresentative
of structural weakness.
• Axialvibration(A)alongthelineoftheshaftismostrepresentative
of faulty alignment and bent shafts.
To get comparable results, the measuring points should be clearly
marked, so that the measurements can always be taken in the same
spots and important, at the same speed. SPM vibration transducers
can be used
• asahand-heldprobe,withorwithouttheprobetipattached.
Notrecommendedabove1000Hz.
• withamagnetforattachmenttoferrousmetalparts. Not recom-
mendedabove2000Hz.
• withtheM8(UNC1/4”-28)mountingscrew.
The firmer the contact with the machine, the better the measuring
result. Plain, clean metal makes the best contact surface for the
vibration transducer.
The vibration transducer is connected via a twisted pair cable to the
VIB input on Leonova. Transducers of typeIEPE*(ICP)withvoltage
output (<24 Vpp) can be used.
Only one vibration transducer can be connected to Leonova when
measuring according to ISO2372. Move the transducer between the
threedirections(H,V,A)andperformthreemeasurements.
DuoTech
®
accelerometers (Dual Technology)
The DuoTech
®
accelerometer is a single transducer solution used
for vibration or shock pulse measurements or both in combination.
• DuoTechwithquickconnector,TRC100,forusewithpermanently
installedmeasuringadapters.ConnecttheDuoTechviathemea-
suringcableCAB82.
• DuoTechforpermanentinstallation,SLC144.
Permanently installed DuoTech accelerometers are mounted in a
countersunk mounting holes identical to holes normally used by
shock pulse transducers. The accelerometer has 2-pin connector
and is connected to Leonova or a measuring terminal via twisted
pair cable. DuoTech is connected to the VIB input on Leonova.
Input for
vibration transducer
Hand-heldprobe
Transducer with magnet
DuoTech with quick connector
Transducer line quality, TLQ
Leonova is automatically testing the quality of signal transmission between transducers of type
IEPE and instrument before measurement. The unit of measure is voltage (Bias). Accepted values
depends on transducer settings. Not acceptable values generates an error message.